Point is that Darwin is not at all compatible with a literalist readingof the Bible, and that is what these folks are pushing.
There are plenty of Christians (including the Pope) who see no comflict between creation and evolution: one is about why we are here, the other is just about how we came to be the way we are.
But there are unfortunately enough people who cannot tell the difference between a religious testament, a sicence book and/or a history book.
And have no idea of how science works, how a hypothesis becomes a theory or how objective, verifiable facts are documented and built upon.